<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <!-- 警示 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
      </el-alert>
      <!-- 进度条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" :props="cateProps" expandTrigger="hover" @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border=""></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 上传图片  action表示图片要上传的api地址-->
            <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headersObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor ref="myQuillEditor" v-model="addForm.goods_introduce" />
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnadd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览区 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>
<script>
import _ from "lodash"
export default {
  data() {
    return {
      activeIndex: "0",
      //添加商品的数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        //图片数组
        pics: [],
        // 商品的详情描述
        goods_introduce: "",
        attrs: [],
      },
      //验证规则
      addFormRules: {
        goods_name: {
          required: "true",
          message: "请输入商品名称",
          trigger: "blur",
        },
        goods_price: {
          required: "true",
          message: "请输入商品价格",
          trigger: "blur",
        },
        goods_weight: {
          required: "true",
          message: "请输入商品重量",
          trigger: "blur",
        },
        goods_number: {
          required: "true",
          message: "请输入商品数量",
          trigger: "blur",
        },
        goods_cat: {
          required: "true",
          message: "请选择商品分类",
          trigger: "blur",
        },
      },
      cateList: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
        // 商品所属的分类数组
        goods_cat: [],
      },
      //动态参数列表数据
      manyTableData: [],
      //静态属性列表数据
      onlyTableData: [],
      // 图片要上传的url地址
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      //图片的绝对路径
      previewPath: "",
      //控制图片预览的展示与隐藏
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },

  methods: {
    //获取商品分类
    async getCateList() {
      const { data: res } = await this.$http.get("categories")
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败")
      }
      this.cateList = res.data
    },
    //级联选择器选中项变化 回触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat)
    },
    //标签页的切换判断
    beforeTabLeave(activeName, oldActiveName) {
      // console.log(oldActiveName);
      //若当前处于第一个标签页 且未选择商品分类 则禁止标签页跳转
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类")
        return false
      }
    },
    //标签页的切换
    async tabClicked() {
      // console.log(this.activeIndex);
      if (this.activeIndex === "1") {
        //证明访问的是商品参数面板
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error("获取商品参数失败")
        }
        // console.log(res.data);
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.lenght === 0 ? [] : item.attr_vals.split(" ")
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === "2") {
        //证明访问的是商品属性面板
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error("获取商品属性失败")
        }
        // console.log(res.data);
        this.onlyTableData = res.data
      }
    },
    //图片预览
    handlePreview(file) {
      // console.log(file);
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //图片移除
    handleRemove(file) {
      // console.log(file);
      //1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((item) => item.pic === filePath)
      // 3.使用数组的splice方法，把图片信息对象 从pics中移除
      this.addForm.pics.splice(i, 1)
      //  console.log(this.addForm.pics)
    },
    //监听图片上传成功
    handleSuccess(response) {
      // console.log(response)
      //1.拼接得到一个图片信息对象
      const picInfo = {
        pic: response.data.tmp_path,
      }
      //2.将图片信息对象 push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm.pics)
    },
    //添加商品
    add() {
      // console.log(this.addForm.goods_introduce);
      // 添加商品 需要先表单预验证
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项")
        }
        //否则 执行添加业务逻辑
        // this.addForm.goods_cat为数组 要转为字符串
        //lodash cloneDeep(obj) 深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(",")
        // 处理动态参数 和 静态属性
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" "),
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach( (item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)
        //发起请求 添加商品
        //商品的名称是唯一的
        const { data: res } = await this.$http.post("goods", form)
        if (res.meta.status !== 201) {
          return this.$message.error("添加商品失败")
        }
        this.$message.success("添加商品成功")
        this.$router.push("/goods")
      })
    },
  },
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnadd {
  margin-top: 15px;
}
</style>
